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Engineering notes
How silicone parts fail, and which design decisions keep them working. Written at the tooling bench, not in a textbook.
01 — Engineering notes
Notes filed under this category
Choosing between 30 and 70 Shore A
Hardness is the first number most buyers name and the last one they should fix. It follows from the failure mode you are trying to avoid, not from a catalogue default.
Compression set is a design decision, not a material defect
When a seal stops sealing, the first question is usually about the compound. More often the answer is in the groove, the strain and the temperature history.
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